阅读说明：本技术 一种用于电冰箱防止压缩机堵转的自动检测装置 (Automatic detection device for preventing compressor from stalling for refrigerator ) 是由 吴芳 于 2021-07-20 设计创作，主要内容包括：本发明涉及电冰箱技术领域,且公开了一种用于电冰箱防止压缩机堵转的自动检测装置,包括箱体,所述箱体内部两侧均固定连接有开关机构,开关机构内侧活动连接有延时机构,延时机构内侧活动连接有卡扣机构,卡扣机构顶部固定连接有警示机构,箱体内部顶部固定连接有检测机构。该用于电冰箱防止压缩机堵转的自动检测装置,通过开关机构触发通断机构和延时机构,延时机构移动的过程中触发卡扣机构,实现检测功能的开启,过滤启动电流,提高设备检测精度,卡扣机构移动的过程中释放检测机构,实现堵转电流的检测功能,防止设备堵转和资源浪费,检测机构移动的过程中触发警示机构,实现设备自动报警提醒功能,提高设备安全性。(The invention relates to the technical field of refrigerators and discloses an automatic detection device for preventing a compressor from being locked, which comprises a box body, wherein both sides in the box body are fixedly connected with a switch mechanism, the inner side of the switch mechanism is movably connected with a time delay mechanism, the inner side of the time delay mechanism is movably connected with a buckle mechanism, the top of the buckle mechanism is fixedly connected with a warning mechanism, and the top in the box body is fixedly connected with a detection mechanism. This an automatic checkout device for refrigerator prevents compressor stalling triggers break-make mechanism and delay mechanism through switching mechanism, the in-process that delay mechanism removed triggers buckle mechanism, realize opening of detection function, filter the starting current, improve equipment detection precision, the in-process release detection mechanism that buckle mechanism removed realizes the detection function of stalling current, prevent equipment stalling and wasting of resources, the in-process that detection mechanism removed triggers warning mechanism, realize equipment automatic alarm and remind the function, improve equipment security.)

1. An automatic detection device for preventing compressor stalling of a refrigerator comprises a box body (1), and is characterized in that: the equal fixedly connected with on-off mechanism (2) of box (1) inside both sides, both sides on-off mechanism (2) link to each other through two accuse connecing, on-off mechanism (2) inboard swing joint has time delay mechanism (3), time delay mechanism (3) include spout (31), spout (31) are encapsulated situation, spout (31) inside right side swing joint has initiative board (32), the ventilation hole has been seted up on initiative board (32), initiative board (32) left side has passive board (34) through time delay spring (33) swing joint, be provided with the damping hole on passive board (34), passive board (35) of fixedly connected with on passive board (34) left side.

2. An automatic detecting device for preventing compressor stalling of a refrigerator according to claim 1, wherein: switch mechanism (2) are including start button (21), start button (21) inboard fixedly connected with push rod (22), push rod (22) middle part fixedly connected with couple (23), couple (23) inboard fixedly connected with reset spring (24), couple (23) top swing joint has cardboard (25), cardboard (25) outside and box (1) swing joint, cardboard (25) bottom just is located couple (23) rear swing joint has ejector pad (26), ejector pad (26) outside fixedly connected with stop button (27), stop button (27) are different with start button (21) colour.

3. An automatic detecting device for preventing compressor stalling of a refrigerator according to claim 1, wherein: the utility model discloses a driven pole (35) inboard swing joint has buckle mechanism (4), and buckle mechanism (4) are including kicking block (41), equal fixedly connected with gyro wheel (42) in kicking block (41) bottom and top, and equal fixedly connected with stopper (43) in kicking block (41) both sides, driven pole (35) inboard fixedly connected with voussoir (44), voussoir (44) offer with the inclined plane of gyro wheel (42) looks adaptation, top gyro wheel (42) top swing joint has baffle (45).

4. An automatic detecting device for preventing compressor stalling of a refrigerator according to claim 1, wherein: the box is characterized in that a detection mechanism (5) is fixedly connected to the top inside the box body (1), the detection mechanism (5) comprises an iron core (51), a lead (52) is movably connected to the outer ring of the iron core (51), an attraction block (54) is movably connected to the bottom of the iron core (51) through a detection spring (53), the attraction block (54) is made of metal materials, and ejector rods (55) are fixedly connected to the two sides of the attraction block (54).

5. An automatic detecting device for preventing compressor stalling of refrigerator according to claim 4, wherein: ejector pin (55) top swing joint has warning mechanism (6), and warning mechanism (6) are including protecting crust (61), and the inside top fixedly connected with alarm seat (62) of protecting crust (61), alarm seat (62) bottom fixedly connected with alarm (63), and ejector pin (55) top just is located alarm (63) below fixedly connected with and triggers piece (64), triggers alarm (63) behind trigger piece (64) contact alarm (63).

6. An automatic detecting device for preventing compressor stalling of refrigerator according to claim 4, wherein: the top of the ejector rod (55) and the inner side of the push rod (22) are both movably connected with an on-off mechanism (7), the on-off mechanism (7) comprises a base (71), the base (71) is fixedly connected with a lead (52), the middle of the base (71) is fixedly connected with a fixed contact (72), the outer side of the fixed contact (72) is movably connected with a movable contact (73), and the movable contact (73) is fixedly connected with the ejector rod (55) and the push rod (22).

Technical Field

The invention relates to the technical field of refrigerators, in particular to an automatic detection device for preventing a compressor of a refrigerator from being locked.

Background

The electronic equipment is composed of electronic components such as integrated circuits, transistors, electron tubes and the like, and is used for playing a role by applying electronic technology (including) software, and comprises an electronic computer, a robot controlled by the electronic computer, a numerical control or program control system and the like. The method mainly comprises the following steps: computers, air conditioners, refrigerators, washing machines, microwave ovens, printers, facsimile machines, all-in-one machines, and the like. A refrigerator is a refrigerating apparatus maintaining a constant low temperature, and is also a consumer product maintaining food or other articles in a constant low temperature state.

The most important part of the refrigerator is a compressor, which is the most important part for temperature control, and the motor load during the operation of the compressor includes a load required for compressing gas and a load required for overcoming mechanical friction. When equipment breaks down, the load of a motor is increased, and further the condition of motor stalling occurs, the stalling current is about 4-8 times of the normal running current, the environment is damaged due to the waste of electric energy resources, although the conventional equipment has a thermal protection function and can protect electrodes during stalling, the conventional equipment generally does not respond quickly, in addition, the starting current of the motor can also approach or reach the stalling current, the protection function of the equipment is not accurate enough, and the equipment is damaged seriously and a large amount of resources are wasted.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides the automatic detection device for preventing the compressor from being locked, which has the advantages of preventing the compressor from being locked, saving resources and solving the problems of locked rotation and resource waste of the existing equipment.

(II) technical scheme

In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides an automatic checkout device for refrigerator prevents compressor stalling, the power distribution box comprises a box body, the equal fixedly connected with switching mechanism in inside both sides of box, the switching mechanism in both sides links to each other through two accuse connecing, be used for equipment to control more, make things convenient for the equipment to use, the inboard swing joint of switching mechanism has delay mechanism, delay mechanism includes the spout, the spout is encapsulated situation, prevent spout gas leakage, the inside right side swing joint of spout has the initiative board, the ventilation hole has been seted up on the initiative board, make things convenient for the initiative board to remove, there is the passive board in the initiative board left side through delay spring swing joint, be provided with the damping hole on the passive board, conveniently, passive board slow movement, passive board left side fixedly connected with passive pole.

Further, on-off mechanism includes the start button, the inboard fixedly connected with push rod of start button, push rod middle part fixedly connected with couple, the inboard fixedly connected with reset spring of couple for promote the push rod and reset, couple top swing joint has the cardboard, cardboard outside and box swing joint make things convenient for the cardboard to rotate, the cardboard bottom just is located couple rear swing joint has the ejector pad, ejector pad outside fixedly connected with stop button, stop button is different with the start button colour, convenient differentiation prevents the maloperation.

Further, driven the inboard swing joint of pole has buckle mechanism, and buckle mechanism includes the kicking block, and the equal fixedly connected with gyro wheel in kicking block bottom and top makes things convenient for the kicking block to remove, reduces frictional force, and the equal fixedly connected with stopper in kicking block both sides prevents that the kicking block from removing the overtravel, driven the inboard fixedly connected with voussoir of pole, the inclined plane with gyro wheel looks adaptation is seted up to the voussoir, conveniently drives the kicking block and removes, top gyro wheel top swing joint has the baffle.

Further, inside top fixedly connected with detection mechanism of box, detection mechanism include the iron core, and iron core outer lane swing joint has the wire, and there is the piece of attraction bottom the iron core through detecting spring swing joint, attracts the piece to use metal material to make, conveniently is attracted by the iron core, attracts the equal fixedly connected with ejector pin in piece both sides.

Further, ejector pin top swing joint has warning mechanism, and warning mechanism includes the protecting crust for the protection warning mechanism, the inside top fixedly connected with alarm seat of protecting crust, alarm seat bottom fixedly connected with alarm, the ejector pin top just is located alarm below fixedly connected with trigger block, trigger block contact alarm after triggering the alarm, remind the workman to maintain.

Furthermore, the top of the ejector rod and the inner side of the push rod are movably connected with an on-off mechanism, the on-off mechanism comprises a base, the base is fixedly connected with a wire and used for being electrified, a fixed contact is fixedly connected to the middle of the base, a movable contact is movably connected to the outer side of the fixed contact, and the movable contact is fixedly connected with the ejector rod and the push rod and used for driving the movable contact to move.

(III) advantageous effects

Compared with the prior art, the invention provides an automatic detection device for preventing the compressor from blocking the rotation of the refrigerator, which has the following beneficial effects:

1. this an automatic checkout device for refrigerator prevents compressor stalling, it removes to the inboard through driving the push rod after pressing start button, the in-process that the push rod removed drives the couple and removes, the couple removes to fix under the effect of cardboard after targetting in place, the in-process that the push rod removed drives movable contact and removes to the inboard, the in-process contact fixed contact that movable contact removed, it removes to the inboard to drive the ejector pad after pressing stop button, the in-process that the ejector pad removed drives the cardboard rotatory, the rotatory in-process release couple of cardboard, the couple releases the back and removes to the outside under reset spring's effect, the couple drives the push rod removal to the in-process that the outside removed, the in-process that the push rod removed moves movable contact and fixed contact separation, realize equipment break-make and open and stop function.

2. The automatic detection device for preventing the compressor from being locked and rotated of the refrigerator drives the driving plate to move in the moving process of the push rod, the delay spring is compressed in the moving process of the driving plate, because the sliding groove is internally sealed, the moving resistance is increased due to compressed air in the moving process of the driven plate, then the compressed air is released from the damping hole to further reduce the moving resistance of the driven plate, the moving resistance of the driven plate is inwards moved under the action of the delay spring when being smaller than the elastic force of the delay spring, the driven rod is driven to move in the moving process of the driven plate, the wedge block is driven to move in the moving process of the driven rod, the roller below is driven to upwards move in the moving process of the wedge block, the top block is driven to upwards move in the moving process of the roller, the baffle is driven to move towards two sides in the moving process of the top block, the suction block is released in the moving process of the baffle, and the delay detection function of the device after being electrified is realized, the method is used for avoiding the starting current of the equipment and improving the detection precision of the locked-rotor current of the equipment.

3. The automatic detection device for preventing the compressor from blocking the rotation of the refrigerator generates magnetism on the iron core through the electromagnetic induction principle after the inside of the lead is electrified, the current inside the lead is increased when the device has the phenomenon of blocking the rotation, thereby increasing the magnetism of the iron core, when the magnetic force of the iron core is larger than the elastic force of the detection spring, the attraction block is driven to move upwards, the ejector rod is driven to move in the upward moving process of the attraction block, the movable contact is driven to move upwards in the moving process of the ejector rod, the movable contact is separated from the fixed contact in the moving process of the movable contact, meanwhile, the ejector rod drives the trigger block to move upwards in the moving process, the trigger block approaches the alarm in the moving process, when the trigger block moves in place, the alarm is triggered, so that the functions of power failure and alarm of the equipment are realized, a worker is reminded of maintaining the equipment in time, the equipment is prevented from being damaged more seriously, and the equipment is prevented from continuously running and wasting more energy.

Drawings

FIG. 1 is a schematic cross-sectional view of the front view structure of the present invention.

FIG. 2 is an enlarged view of a portion of FIG. 1.

FIG. 3 is an enlarged view of the portion B shown in FIG. 1 according to the present invention.

FIG. 4 is an enlarged view of the portion C shown in FIG. 1 according to the present invention.

In the figure: 1. a box body; 2. a switch mechanism; 21. a start button; 22. a push rod; 23. hooking; 24. a return spring; 25. clamping a plate; 26. a push block; 27. a stop button; 3. a time delay mechanism; 31. a chute; 32. a driving plate; 33. a delay spring; 34. a passive plate; 35. a passive rod; 4. a buckle mechanism; 41. a top block; 42. a roller; 43. a limiting block; 44. a wedge block; 45. a baffle plate; 5. a detection mechanism; 51. an iron core; 52. a wire; 53. detecting a spring; 54. an attraction block; 55. a top rod; 6. a warning mechanism; 61. a protective shell; 62. an alarm seat; 63. an alarm; 64. a trigger block; 7. an on-off mechanism; 71. a base; 72. a fixed contact; 73. a movable contact.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

referring to fig. 1, an automatic detection device for preventing compressor stalling of a refrigerator comprises a box body 1, switch mechanisms 2 are fixedly connected to two sides of the interior of the box body 1, the switch mechanisms 2 on the two sides are connected through a double-control connection method and are used for multi-control of equipment, the use of the equipment is facilitated, delay mechanisms 3 are movably connected to the inner sides of the switch mechanisms 2, the delay mechanisms 3 comprise sliding grooves 31, the sliding grooves 31 are in a sealing state and prevent air leakage of the sliding grooves 31, driving plates 32 are movably connected to the right sides of the interior of the sliding grooves 31, ventilation holes are formed in the driving plates 32 and facilitate movement of the driving plates 32, driven plates 34 are movably connected to the left sides of the driving plates 32 through delay springs 33, damping holes are formed in the driven plates 34 and facilitate slow movement of the driven plates 34, and driven plates 35 are fixedly connected to the left sides of the driven plates 34.

The switching mechanism 2 is manually pressed down to trigger the on-off mechanism 7, so that the on-off function of the equipment is realized; the delay mechanism 3 is triggered in the moving process of the switch mechanism 2, the buckle mechanism 4 is triggered in the moving process of the delay mechanism 3, the starting of the detection function is realized, the starting current is filtered, and the detection precision of the equipment is improved; the in-process that buckle mechanism 4 removed releases detection mechanism 5, realizes the detection function of locked rotor current, prevents equipment locked rotor, improves equipment security, prevents the wasting of resources.

In addition, the warning mechanism 6 is triggered in the moving process of the detection mechanism 5, the automatic alarm reminding function of the equipment is realized, the safety of the equipment is improved, and the resource loss is reduced.

Further, on-off mechanism 2 includes start button 21, the inboard fixedly connected with push rod 22 of start button 21, push rod 22 middle part fixedly connected with couple 23, 23 inboard fixedly connected with reset spring 24 of couple, be used for promoting push rod 22 to reset, 23 top swing joint of couple has cardboard 25, cardboard 25 outside and 1 swing joint of box, make things convenient for cardboard 25 rotatory, cardboard 25 bottom just is located 23 rear swing joint of couple has ejector pad 26, ejector pad 26 outside fixedly connected with stop button 27, stop button 27 is different with start button 21 colour, convenient differentiation, prevent the maloperation.

Further, driven the inboard swing joint of pole 35 has buckle mechanism 4, buckle mechanism 4 includes kicking block 41, the equal fixedly connected with gyro wheel 42 in kicking block 41 bottom and top makes things convenient for kicking block 41 to remove, reduce frictional force, the equal fixedly connected with stopper 43 in kicking block 41 both sides prevents that kicking block 41 from removing the overtravel, driven the inboard fixedly connected with voussoir 44 of pole 35, the inclined plane with gyro wheel 42 looks adaptation is seted up to voussoir 44, conveniently drive kicking block 41 and remove, top gyro wheel 42 top swing joint has baffle 45.

Further, the top of the ejector rod 55 and the inner side of the push rod 22 are both movably connected with an on-off mechanism 7, the on-off mechanism 7 comprises a base 71, the base 71 is fixedly connected with the conducting wire 52 and used for being electrified, the middle of the base 71 is fixedly connected with a fixed contact 72, the outer side of the fixed contact 72 is movably connected with a movable contact 73, and the movable contact 73 is fixedly connected with the ejector rod 55 and the push rod 22 and used for driving the movable contact 73 to move.

The switching mechanism 2 is manually pressed down to trigger the on-off mechanism 7, so that the on-off function of the equipment is realized; the delay mechanism 3 is triggered in the moving process of the switch mechanism 2, the buckle mechanism 4 is triggered in the moving process of the delay mechanism 3, the starting of the detection function is realized, the starting current is filtered, and the detection precision of the equipment is improved; specifically, the push rod 22 is driven to move inwards after the start button 21 is pressed, the hook 23 is driven to move in the moving process of the push rod 22, the hook 23 is fixed under the action of the clamping plate 25 after moving in place, the movable contact 73 is driven to move inwards in the moving process of the push rod 22, the movable contact 73 is in contact with the fixed contact 72 in the moving process, the stop button 27 is pressed to drive the push block 26 to move inwards, the clamping plate 25 is driven to rotate in the moving process of the push block 26, the hook 23 is released in the rotating process of the clamping plate 25, the hook 23 moves outwards under the action of the reset spring 24 after being released, the push rod 22 is driven to move in the outward moving process of the hook 23, the movable contact 73 is driven to be separated from the fixed contact 72 in the moving process of the push rod 22, and the power-on and power-off and start-off functions of the equipment are realized.

The push rod 22 drives the driving plate 32 to move in the moving process, the delay spring 33 is compressed in the moving process of the driving plate 32, because the sliding groove 31 is internally sealed, the moving resistance is increased due to compressed air in the moving process of the driven plate 34, then the compressed air is released from the damping hole to further reduce the moving resistance of the driven plate 34, the moving resistance of the driven plate 34 is smaller than the elastic force of the delay spring 33, the driven plate 34 moves inwards under the action of the delay spring 33, the driven rod 35 is driven to move in the moving process of the driven plate 34, the wedge block 44 is driven to move in the moving process of the driven rod 35, the roller 42 below is driven to move upwards in the moving process of the wedge block 44, the top block 41 is driven to move upwards in the moving process of the roller 42, the baffle plate 45 is driven to move towards two sides in the moving process of the baffle plate 45, the suction block 54 is released in the moving process of the baffle plate 45, and the detection function of the device is started, the function of delay detection after the equipment is electrified is realized, the starting current of the equipment is avoided, and the detection precision of the locked rotor current of the equipment is improved.

Example two:

referring to fig. 1-4, an automatic detection device for preventing compressor stalling of a refrigerator comprises a box body 1, wherein both sides of the interior of the box body 1 are fixedly connected with switch mechanisms 2, the switch mechanisms 2 at both sides are connected through a double-control connection method, the switch mechanism 2 comprises a start button 21, a push rod 22 is fixedly connected on the inner side of the start button 21, a hook 23 is fixedly connected in the middle of the push rod 22, a return spring 24 is fixedly connected on the inner side of the hook 23, be used for promoting push rod 22 to reset, 23 top swing joint of couple has cardboard 25, cardboard 25 outside and box 1 swing joint make things convenient for cardboard 25 rotatory, cardboard 25 bottom just is located 23 rear swing joint of couple has ejector pad 26, ejector pad 26 outside fixedly connected with stop button 27, stop button 27 is different with the 21 colours of start button, conveniently distinguishes, prevents the maloperation.

The inner side of the switch mechanism 2 is movably connected with a delay mechanism 3, the delay mechanism 3 comprises a chute 31, the chute 31 is in a sealing state and prevents the chute 31 from leaking air, the right side inside the chute 31 is movably connected with a driving plate 32, the driving plate 32 is provided with a ventilation hole to facilitate the movement of the driving plate 32, the left side of the driving plate 32 is movably connected with a driven plate 34 through a delay spring 33, the driven plate 34 is provided with a damping hole to facilitate the slow movement of the driven plate 34, the left side of the driven plate 34 is fixedly connected with a driven rod 35, the inner side of the driven rod 35 is movably connected with a buckling mechanism 4, the buckling mechanism 4 comprises a top block 41, the bottom and the top of the top block 41 are both fixedly connected with rollers 42 to facilitate the movement of the top block 41 and reduce friction force, both sides of the top block 41 are both fixedly connected with limit blocks 43 to prevent the top block 41 from moving over travel, the inner side of the driven rod 35 is fixedly connected with a wedge block 44, the wedge block 44 is provided with an inclined plane matched with the rollers 42, the ejector block 41 is conveniently driven to move, and the top of the upper roller 42 is movably connected with a baffle 45.

The top inside the box body 1 is fixedly connected with a detection mechanism 5, the detection mechanism 5 comprises an iron core 51, the outer ring of the iron core 51 is movably connected with a lead 52, the bottom of the iron core 51 is movably connected with an attraction block 54 through a detection spring 53, the attraction block 54 is made of metal materials and is conveniently attracted by the iron core 51, both sides of the attraction block 54 are fixedly connected with ejector rods 55, the top of each ejector rod 55 is movably connected with a warning mechanism 6, each warning mechanism 6 comprises a protective shell 61 and is used for protecting the warning mechanism 6, the top inside the protective shell 61 is fixedly connected with an alarm seat 62, the bottom of the alarm seat 62 is fixedly connected with an alarm 63, the top of each ejector rod 55 is fixedly connected with a trigger block 64 below the alarm 63, the trigger block 64 contacts the alarm 63 and then triggers the alarm 63 to remind workers to maintain, the tops of the on-off mechanisms 7 and the inner sides of the ejector rods 55 and the push rods 22 are both movably connected with the on-off mechanisms 7, and the on-off mechanisms 7 comprise bases 71, the base 71 is fixedly connected with the lead 52 for electrifying, the middle part of the base 71 is fixedly connected with a fixed contact 72, the outer side of the fixed contact 72 is movably connected with a movable contact 73, and the movable contact 73 is fixedly connected with the ejector rod 55 and the push rod 22 for driving the movable contact 73 to move.

The working principle is as follows: the push rod 22 is driven to move towards the inner side after the start button 21 is pressed, the hook 23 is driven to move in the moving process of the push rod 22, the hook 23 is fixed under the action of the clamping plate 25 after moving in place, the movable contact 73 is driven to move towards the inner side in the moving process of the push rod 22, the movable contact 73 is contacted with the fixed contact 72 in the moving process, the push block 26 is driven to move towards the inner side after the stop button 27 is pressed, the clamping plate 25 is driven to rotate in the moving process of the push block 26, the hook 23 is released in the rotating process of the clamping plate 25, the hook 23 moves towards the outer side under the action of the reset spring 24 after being released, the push rod 22 is driven to move in the moving process of the hook 23 towards the outer side, the movable contact 73 is driven to be separated from the fixed contact 72 in the moving process of the push rod 22, and the power-on and power-off and start-off and stop functions of the equipment are realized.

The push rod 22 drives the driving plate 32 to move in the moving process, the delay spring 33 is compressed in the moving process of the driving plate 32, because the sliding groove 31 is internally sealed, the moving resistance is increased due to compressed air in the moving process of the driven plate 34, then the compressed air is released from the damping hole to further reduce the moving resistance of the driven plate 34, the moving resistance of the driven plate 34 is smaller than the elastic force of the delay spring 33, the driven plate 34 moves inwards under the action of the delay spring 33, the driven rod 35 is driven to move in the moving process of the driven plate 34, the wedge block 44 is driven to move in the moving process of the driven rod 35, the roller 42 below is driven to move upwards in the moving process of the wedge block 44, the top block 41 is driven to move upwards in the moving process of the roller 42, the baffle plate 45 is driven to move towards two sides in the moving process of the baffle plate 45, the suction block 54 is released in the moving process of the baffle plate 45, and the delay detection function after the equipment is electrified is realized, the method is used for avoiding the starting current of the equipment and improving the detection precision of the locked-rotor current of the equipment.

After the inside of the wire 52 is electrified, magnetism is generated on the iron core 51 through an electromagnetic induction principle, when the stalling phenomenon occurs to equipment, the current inside the wire 52 is increased, and further the magnetism of the iron core 51 is increased, when the magnetic force of the iron core 51 is greater than the elastic force of the detection spring 53, the attraction block 54 is driven to move upwards, the ejector rod 55 is driven to move in the upward movement process of the attraction block 54, the movable contact 73 is driven to move upwards in the movement process of the ejector rod 55, the movable contact 73 is separated from the fixed contact 72 in the movement process of the movable contact 73, meanwhile, the trigger block 64 is driven to move upwards in the movement process of the ejector rod 55, the trigger block 64 is close to the alarm 63 in the movement process, the alarm 63 is triggered after the trigger block 64 is moved to the right position, the power-off and alarm functions of the equipment are realized, a worker is reminded of timely maintenance, the equipment is prevented from being damaged more seriously, and more energy resources are prevented from being wasted when the equipment is continuously operated.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.